A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

If you had an infinite supply of water and 5-quart and 3-quart pails, how would you measure exactly 4 quarts? What is the least number of steps you need?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

Which flower has two lips?

Katniss and Peeta are liars. They both lie on some specific days.

Katniss lies on Fridays, Saturdays and Sundays. She speaks the truth on all other days.

Peeta lies on Tuesdays, Wednesdays and Thursdays. He speaks the truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

People make me, save me, change me, raise me. What am I?

A bomb exploded in a room full of married couples and no one died. How?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

What is the next shape from answers A, B, C, and D figure?